Evidence Based Medicine

Question 1

What are the aims of a cohort study?

Answer 1

Estimate of risk in a general population
Ability to pick up infrequent occurrences
Ability to find outcomes you hadn’t expected

Question 2

How is relative risk calculated?

Answer 2

Incidence in exposed/incidence in not exposed

Question 3

How is absolute risk calculated?

Answer 3

Risk in exposed group - Risk in not exposed group

Question 4

What is the difference between a case study and a cohort study?

Answer 4

Cohort: starts with study population and then go on to look at the outcomes of those exposed and not exposed

Case study: look at the outcomes in an exposed and unexposed group and then go back and look at the population “work backwards”

Question 5

What is a “P” value?

Answer 5

A numerical value indicating the probability that this observation has occurred due to chance

Question 6

What is the null hypothesis?

Answer 6

States that there is no difference between 2 groups

Question 7

What is Caldecott Guardian Approval?

Answer 7

Allows access to patient records without individual consent